矩阵[1,0,0,1;1,1,0,0;0,1,1,0;0,0,1,0]与[1,2,3,4;5,6,7,1;2,3,4,5;6,7,1,2]逐元素相乘的矩阵的和是多少

A=[1,0,0,1;1,1,0,0;0,1,1,0;0,0,1,0]
B=[1,2,3,4;5,6,7,1;2,3,4,5;6,7,1,2]
C=A.*B
sum(sum(C))
结果：
A =
1 0 0 1
1 1 0 0
0 1 1 0
0 0 1 0
B =
1 2 3 4
5 6 7 1
2 3 4 5
6 7 1 2
C =
1 0 0 4
5 6 0 0
0 3 4 0
0 0 1 0
ans =
24